According to a report by Stanford University, from the turn of this century to August 26, 2015, there have been 138 documented mass shootings in the United States resulting in 555 victim fatalities and a total of 1092 victims. To put that number in perspective, that is more than the total number of documented mass shootings in the entire second half of the 20th century. In this context, a mass shooting is defined by three or more shooting victims (not necessarily fatalities), not including the s. . . See the complete description at http://www.thedrboshow.com/tools/bg/Bo/TheDrBoShow